Finding the Third Proportional to 311,074 and 666,208

Step by Step Solution

1. Step 1: Write the proportion equation
   311,074 : 666,208 = 666,208 : x
2. Step 2: Convert to fraction form
   311,074/666,208 = 666,208/x
3. Step 3: Cross multiply
   311,074x = 666,208 × 666,208
4. Step 4: Simplify right side
   311,074x = 443,833,099,264
5. Step 5: Solve for x
   x = 443,833,099,264/311,074
6. Step 6: Final answer
   x = 1,426,776.58